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Issue #8808: The IMAP4_SSL constructor now allows passing an SSLContext 

parameter to control parameters of the secure channel.  Patch by Sijin
Joseph.
This commit is contained in:
Antoine Pitrou 2011-05-06 18:49:52 +02:00
parent 45fd0c9931
commit 0872816dc1
4 changed files with 83 additions and 10 deletions
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11
Doc/library/imaplib.rst
View File

@ -64,14 +64,21 @@ Three exceptions are defined as attributes of the :class:`IMAP4` class:
There's also a subclass for secure connections:
.. class:: IMAP4_SSL(host='', port=IMAP4_SSL_PORT, keyfile=None, certfile=None)
.. class:: IMAP4_SSL(host='', port=IMAP4_SSL_PORT, keyfile=None, certfile=None, ssl_context=None)
This is a subclass derived from :class:`IMAP4` that connects over an SSL
encrypted socket (to use this class you need a socket module that was compiled
with SSL support). If *host* is not specified, ``''`` (the local host) is used.
If *port* is omitted, the standard IMAP4-over-SSL port (993) is used. *keyfile*
and *certfile* are also optional - they can contain a PEM formatted private key
and certificate chain file for the SSL connection.
and certificate chain file for the SSL connection. *ssl_context* parameter is a
:class:`ssl.SSLContext` object which allows bundling SSL configuration
options, certificates and private keys into a single (potentially long-lived)
structure. Note that the *keyfile*/*certfile* parameters are mutually exclusive with *ssl_context*,
a :class:`ValueError` is thrown if *keyfile*/*certfile* is provided along with *ssl_context*.
.. versionchanged:: 3.3
*ssl_context* parameter added.
The second subclass allows for connections created by a child process:

23
Lib/imaplib.py
View File

@ -1177,25 +1177,40 @@ if HAVE_SSL:
"""IMAP4 client class over SSL connection
Instantiate with: IMAP4_SSL([host[, port[, keyfile[, certfile]]]])
Instantiate with: IMAP4_SSL([host[, port[, keyfile[, certfile[, ssl_context]]]]])
host - host's name (default: localhost);
port - port number (default: standard IMAP4 SSL port).
port - port number (default: standard IMAP4 SSL port);
keyfile - PEM formatted file that contains your private key (default: None);
certfile - PEM formatted certificate chain file (default: None);
ssl_context - a SSLContext object that contains your certificate chain
and private key (default: None)
Note: if ssl_context is provided, then parameters keyfile or
certfile should not be set otherwise ValueError is thrown.
for more documentation see the docstring of the parent class IMAP4.
"""
def __init__(self, host = '', port = IMAP4_SSL_PORT, keyfile = None, certfile = None):
def __init__(self, host='', port=IMAP4_SSL_PORT, keyfile=None, certfile=None, ssl_context=None):
if ssl_context is not None and keyfile is not None:
raise ValueError("ssl_context and keyfile arguments are mutually "
"exclusive")
if ssl_context is not None and certfile is not None:
raise ValueError("ssl_context and certfile arguments are mutually "
"exclusive")
self.keyfile = keyfile
self.certfile = certfile
self.ssl_context = ssl_context
IMAP4.__init__(self, host, port)
def _create_socket(self):
sock = IMAP4._create_socket(self)
return ssl.wrap_socket(sock, self.keyfile, self.certfile)
if self.ssl_context:
return self.ssl_context.wrap_socket(sock)
else:
return ssl.wrap_socket(sock, self.keyfile, self.certfile)
def open(self, host='', port=IMAP4_SSL_PORT):
"""Setup connection to remote server on "host:port".

55
Lib/test/test_imaplib.py
View File

@ -258,11 +258,58 @@ class RemoteIMAP_SSLTest(RemoteIMAPTest):
port = 993
imap_class = IMAP4_SSL
def setUp(self):
pass
def tearDown(self):
pass
def create_ssl_context(self):
ssl_context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
ssl_context.load_cert_chain(CERTFILE)
return ssl_context
def check_logincapa(self, server):
try:
for cap in server.capabilities:
self.assertIsInstance(cap, str)
self.assertFalse('LOGINDISABLED' in server.capabilities)
self.assertTrue('AUTH=PLAIN' in server.capabilities)
rs = server.login(self.username, self.password)
self.assertEqual(rs[0], 'OK')
finally:
server.logout()
def test_logincapa(self):
for cap in self.server.capabilities:
self.assertIsInstance(cap, str)
self.assertFalse('LOGINDISABLED' in self.server.capabilities)
self.assertTrue('AUTH=PLAIN' in self.server.capabilities)
with transient_internet(self.host):
_server = self.imap_class(self.host, self.port)
self.check_logincapa(_server)
def test_logincapa_with_client_certfile(self):
with transient_internet(self.host):
_server = self.imap_class(self.host, self.port, certfile=CERTFILE)
self.check_logincapa(_server)
def test_logincapa_with_client_ssl_context(self):
with transient_internet(self.host):
_server = self.imap_class(self.host, self.port, ssl_context=self.create_ssl_context())
self.check_logincapa(_server)
def test_logout(self):
with transient_internet(self.host):
_server = self.imap_class(self.host, self.port)
rs = _server.logout()
self.assertEqual(rs[0], 'BYE')
def test_ssl_context_certfile_exclusive(self):
with transient_internet(self.host):
self.assertRaises(ValueError, self.imap_class, self.host, self.port,
certfile=CERTFILE, ssl_context=self.create_ssl_context())
def test_ssl_context_keyfile_exclusive(self):
with transient_internet(self.host):
self.assertRaises(ValueError, self.imap_class, self.host, self.port,
keyfile=CERTFILE, ssl_context=self.create_ssl_context())
def test_main():

4
Misc/NEWS
View File

@ -140,6 +140,10 @@ Core and Builtins
Library
-------
- Issue #8808: The IMAP4_SSL constructor now allows passing an SSLContext
parameter to control parameters of the secure channel. Patch by Sijin
Joseph.
- ntpath.samefile failed to notice that "a.txt" and "A.TXT" refer to the same
file on Windows XP. As noticed in issue #10684.